As "The Watch" hits theaters on Friday, it joins a small but mighty league of alien comedies. In the film, a neighborhood watch team that includes Ben Stiller, Vince Vaugh, Jonah Hill and Richard Ayoade, patrol the streets as vigilantes and end up having to save the planet from an alien invasion. Hilarity and dirty jokes ensue, as is par for the course in all alien comedies.

The cast list for this road tripping comedy about fanboys who pick up a hitchhiking alien reads like a who's who of our favorite comedians: Simon Pegg, Nick Frost, Kristen Wiig, Jason Bateman, Bill Hader and Seth Rogan. For a movie that includes a potty-mouthed alien and a fundamentalist Christian, it's good for more than a few laughs.

For a "Star Trek" parody with Tim Allen and sci-fi it-girl Sigourney Weaver, this spoof holds up. Since its release the comedy has gained a cult following from "Star Trek," sci-fi and comedy fans alike.

What's your favorite alien comedy? Let us know in the comment below and on Twitter!